Ultra-high-pressure large-diameter fracturing gate valve with labor-saving mechanism

Abstract

The invention discloses an ultra-high-pressure large-diameter fracturing gate valve with a labor-saving mechanism. The ultra-high-pressure large-diameter fracturing gate valve comprises a valve body,an upper valve cover, a lower valve cover, a lower valve rod, and an upper valve rod, wherein the valve body is internally provided with a valve plate and a valve seat; the upper valve cover is connected with the upper part of the valve body; the lower valve cover is connected with the lower part of the valve body; the lower valve rod is screwed at the lower part of the valve plate; and the uppervalve rod is screwed at the upper part of the valve plate; a bearing pressing cap is arranged at the top of the upper valve rod, a nut sleeve is installed inside the bearing pressing cap, a ball screwis installed inside the nut sleeve, and a connecting cylinder sleeves the upper end of the ball screw; the upper end of the connecting cylinder is connected with a transmission sleeve, the top of thetransmission sleeve is connected with a gear reducer, when the nut sleeve rotates, a screw in the ball screw is driven to move up and down, and the lower part of the screw is connected with the uppervalve rod to drive the upper valve rod and the valve plate to move up and down to open and close a valve. According to the ultra-high-pressure large-diameter fracturing gate valve with the labor-saving mechanism, the connection mode process of the ball screw and the valve rods is good, and thus the rods are installed in a sealed mode advantageously; and the ball screw adopts a flange to transferthe torque, the bearing capacity is high, installation is convenient, a labor-saving device is arranged, and field personnel can be made to operate conveniently.

Description

technical field [0001] The invention relates to the technical field of oil and gas development equipment, in particular to a fracturing gate valve with an ultra-high pressure and large diameter and a labor-saving mechanism. Background technique [0002] In the field of oil and gas, due to clogging of production layers or stratum structure in the middle and late stages of wellhead exploitation, the wellhead pressure drops and production decreases, so it is necessary to perform fracturing operations on the wellhead. Fracturing is to artificially create fractures in the formation, improve the flow environment of oil and gas underground, increase oil and gas production, and play an important role in improving the flow conditions at the bottom of the well, slowing down interlayers and improving the production status of oil layers. [0003] Fracturing valves are the core components of fracturing operations, and high-pressure and large-diameter fracturing valves are the trend. Dur...

AI Technical Summary

Problems solved by technology

like figure 1 , figure 2 and image 3 As shown, the large diameter and high pressure also bring about a sharp increase in valve torque, which not only makes it difficult for on-site personnel to open and close smoothly; The pins are connected by 15, the workmanship is poor, and the pin holes are easy to damage the seal during installation

In the prior art, the connection form of the ball screw 10 and the nut sleeve 9 is to transmit torque through the key, which has a small torque bearing capacity and high processing accuracy requirements. Due to the low load capacity and inconvenient processing and installation, it cannot meet the current needs.

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